Windows 11 KB5077181 Causing Boot Loops? Here's How to Fix It
You turn on your PC. The manufacturer logo appears. Then the spinning circle of dots appears. And appears. And appears. Your PC keeps restarting — o…
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etcd для самых маленьких: гайд по хранилищу kubernetes
Разбираемся, что за зверь хранит весь ваш Kubernetes, учимся читать его ошибки и честно отвечаем на вопрос, можно ли ему доверят…
Расследование Sentry инцидента
Привет. Хочу разобрать один сумбурный кейс из поддержки Sentry-инстанса. Проблема: Утро, как обычно. В Slack пишут разработчики: «Слушай, с Sentry ч…
Debugging VPN DNS Problems: Find the Layer That Is Actually Answering
When DNS starts behaving strangely—a site resolves differently than expected, a recent change does not appear, or two devices disagree—the VPN often…
"Power Query Error: Formula.Firewall and Privacy Level Errors"
This isn't a syntax error or a bug in the query — it's Power Query's Formula Firewall refusing to combine data from more than one source until it kn…
DE-3. Расследование Sentry инцидента. Бой с тенью
Инцидент Sentry. Как мы поэтапно наращивали мониторинг, локализовали первопричину и к каким решениям пришли Читать далее
VPN After Sleep, Roaming, and Network Switches: What Reconnection Looks Like
A VPN connection doesn't exist independently of the network underneath it. It is built on whatever network the device happens to be using at that mo…
VPN Troubleshooting, One Layer at a Time: A Diagnostic Checklist
Most VPN troubleshooting goes wrong in the same predictable way: three things get changed at once, and whatever happens next, nothing has been learn…
How FaultBox helped me solve a storage corruption bug I couldn't reproduce
I was testing NodeDB-Lite and PageDB through a real memory-layer application built on top of them. NodeDB-Lite is the embedded form of NodeDB for lo…
VERCEL_EXPERIMENTAL_DEV_SKIP_LINK: Stop Dev Link Hangs
TL;DR If the Vercel CLI keeps trying to open a dev link against your Vercel project during local next dev runs, set VERCEL_EXPERIMENTAL_DEV_SKIP_LIN…
My laptop told me to load the kernel first, so I did (a missing-kernel horror story on EndeavourOS)
So I rebooted my machine like a normal person and got slapped with a blue GRUB screen: error: file '/boot/vmlinuz-linux-lts' not found. you need to…
How to Use Claude to Troubleshoot Linux Servers
Claude is genuinely useful for production Linux troubleshooting — when you use it right. Here's the workflow that works, after a year of using it on…
Logs vs. Metrics: Which is More Effective for Troubleshooting?
When something goes wrong in our systems, the first thing that usually comes to mind is the question "why?" To find the answer, we turn to two main…
Сети База для начинающих
Микросервисы запускаются, контейнеры оркестрируются, а сеть… ну, она как-то сама работает. Негласное правило многих начинающих разработчиков и админ…